/*
 * Copyright 2023 - 2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.ai.document;

import java.util.List;
import java.util.function.Function;

public interface DocumentRetriever extends Function<String, List<Document>> {

	/**
	 * Retrieves relevant documents however the implementation sees fit.
	 * @param query query string
	 * @return relevant documents
	 */
	List<Document> retrieve(String query);

	default List<Document> apply(String query) {
		return retrieve(query);
	}

}
